[Patch v8 14/18] net/mana: add function to receive packets

[longli@linuxonhyperv.com]

From: Long Li <longli@microsoft.com>

With all the RX queues created, MANA can use those queues to receive
packets.

Signed-off-by: Long Li <longli@microsoft.com>
---
Change log:
v2:
Add mana_ to all function names.
Rename a camel case.
v8:
Fix coding style to function definitions.

 doc/guides/nics/features/mana.ini |   2 +
 drivers/net/mana/mana.c           |   2 +
 drivers/net/mana/mana.h           |  37 +++++++++++
 drivers/net/mana/mp.c             |   2 +
 drivers/net/mana/rx.c             | 105 ++++++++++++++++++++++++++++++
 5 files changed, 148 insertions(+)

diff --git a/doc/guides/nics/features/mana.ini b/doc/guides/nics/features/mana.ini
index 821443b292..fdbf22d335 100644
--- a/doc/guides/nics/features/mana.ini
+++ b/doc/guides/nics/features/mana.ini
@@ -6,6 +6,8 @@
 [Features]
 Link status          = P
 Linux                = Y
+L3 checksum offload  = Y
+L4 checksum offload  = Y
 Multiprocess aware   = Y
 Queue start/stop     = Y
 Removal event        = Y
diff --git a/drivers/net/mana/mana.c b/drivers/net/mana/mana.c
index 67bef6bd32..7ed6063cc3 100644
--- a/drivers/net/mana/mana.c
+++ b/drivers/net/mana/mana.c
@@ -990,6 +990,8 @@ mana_pci_probe_mac(struct rte_pci_device *pci_dev,
 				/* fd is no not used after mapping doorbell */
 				close(fd);
 
+				eth_dev->rx_pkt_burst = mana_rx_burst;
+
 				rte_spinlock_lock(&mana_shared_data->lock);
 				mana_shared_data->secondary_cnt++;
 				mana_local_data.secondary_cnt++;
diff --git a/drivers/net/mana/mana.h b/drivers/net/mana/mana.h
index 27fff35555..c2ffa14009 100644
--- a/drivers/net/mana/mana.h
+++ b/drivers/net/mana/mana.h
@@ -177,6 +177,11 @@ struct gdma_work_request {
 
 enum mana_cqe_type {
 	CQE_INVALID                     = 0,
+
+	CQE_RX_OKAY                     = 1,
+	CQE_RX_COALESCED_4              = 2,
+	CQE_RX_OBJECT_FENCE             = 3,
+	CQE_RX_TRUNCATED                = 4,
 };
 
 struct mana_cqe_header {
@@ -202,6 +207,35 @@ struct mana_cqe_header {
 	(NDIS_HASH_TCP_IPV4 | NDIS_HASH_UDP_IPV4 | NDIS_HASH_TCP_IPV6 |      \
 	 NDIS_HASH_UDP_IPV6 | NDIS_HASH_TCP_IPV6_EX | NDIS_HASH_UDP_IPV6_EX)
 
+struct mana_rx_comp_per_packet_info {
+	uint32_t packet_length	: 16;
+	uint32_t reserved0	: 16;
+	uint32_t reserved1;
+	uint32_t packet_hash;
+}; /* HW DATA */
+#define RX_COM_OOB_NUM_PACKETINFO_SEGMENTS 4
+
+struct mana_rx_comp_oob {
+	struct mana_cqe_header cqe_hdr;
+
+	uint32_t rx_vlan_id				: 12;
+	uint32_t rx_vlan_tag_present			: 1;
+	uint32_t rx_outer_ip_header_checksum_succeeded	: 1;
+	uint32_t rx_outer_ip_header_checksum_failed	: 1;
+	uint32_t reserved				: 1;
+	uint32_t rx_hash_type				: 9;
+	uint32_t rx_ip_header_checksum_succeeded	: 1;
+	uint32_t rx_ip_header_checksum_failed		: 1;
+	uint32_t rx_tcp_checksum_succeeded		: 1;
+	uint32_t rx_tcp_checksum_failed			: 1;
+	uint32_t rx_udp_checksum_succeeded		: 1;
+	uint32_t rx_udp_checksum_failed			: 1;
+	uint32_t reserved1				: 1;
+	struct mana_rx_comp_per_packet_info
+		packet_info[RX_COM_OOB_NUM_PACKETINFO_SEGMENTS];
+	uint32_t received_wqe_offset;
+}; /* HW DATA */
+
 struct gdma_wqe_dma_oob {
 	uint32_t reserved:24;
 	uint32_t last_v_bytes:8;
@@ -370,6 +404,9 @@ int gdma_post_work_request(struct mana_gdma_queue *queue,
 			   struct gdma_posted_wqe_info *wqe_info);
 uint8_t *gdma_get_wqe_pointer(struct mana_gdma_queue *queue);
 
+uint16_t mana_rx_burst(void *dpdk_rxq, struct rte_mbuf **rx_pkts,
+		       uint16_t pkts_n);
+
 uint16_t mana_rx_burst_removed(void *dpdk_rxq, struct rte_mbuf **pkts,
 			       uint16_t pkts_n);
 
diff --git a/drivers/net/mana/mp.c b/drivers/net/mana/mp.c
index a3b5ede559..feda30623a 100644
--- a/drivers/net/mana/mp.c
+++ b/drivers/net/mana/mp.c
@@ -141,6 +141,8 @@ mana_mp_secondary_handle(const struct rte_mp_msg *mp_msg, const void *peer)
 	case MANA_MP_REQ_START_RXTX:
 		DRV_LOG(INFO, "Port %u starting datapath", dev->data->port_id);
 
+		dev->rx_pkt_burst = mana_rx_burst;
+
 		rte_mb();
 
 		res->result = 0;
diff --git a/drivers/net/mana/rx.c b/drivers/net/mana/rx.c
index 968e50686d..b80a5d1c7a 100644
--- a/drivers/net/mana/rx.c
+++ b/drivers/net/mana/rx.c
@@ -352,3 +352,108 @@ mana_start_rx_queues(struct rte_eth_dev *dev)
 	mana_stop_rx_queues(dev);
 	return ret;
 }
+
+uint16_t
+mana_rx_burst(void *dpdk_rxq, struct rte_mbuf **pkts, uint16_t pkts_n)
+{
+	uint16_t pkt_received = 0, cqe_processed = 0;
+	struct mana_rxq *rxq = dpdk_rxq;
+	struct mana_priv *priv = rxq->priv;
+	struct gdma_comp comp;
+	struct rte_mbuf *mbuf;
+	int ret;
+
+	while (pkt_received < pkts_n &&
+	       gdma_poll_completion_queue(&rxq->gdma_cq, &comp) == 1) {
+		struct mana_rxq_desc *desc;
+		struct mana_rx_comp_oob *oob =
+			(struct mana_rx_comp_oob *)&comp.completion_data[0];
+
+		if (comp.work_queue_number != rxq->gdma_rq.id) {
+			DRV_LOG(ERR, "rxq comp id mismatch wqid=0x%x rcid=0x%x",
+				comp.work_queue_number, rxq->gdma_rq.id);
+			rxq->stats.errors++;
+			break;
+		}
+
+		desc = &rxq->desc_ring[rxq->desc_ring_tail];
+		rxq->gdma_rq.tail += desc->wqe_size_in_bu;
+		mbuf = desc->pkt;
+
+		switch (oob->cqe_hdr.cqe_type) {
+		case CQE_RX_OKAY:
+			/* Proceed to process mbuf */
+			break;
+
+		case CQE_RX_TRUNCATED:
+			DRV_LOG(ERR, "Drop a truncated packet");
+			rxq->stats.errors++;
+			rte_pktmbuf_free(mbuf);
+			goto drop;
+
+		case CQE_RX_COALESCED_4:
+			DRV_LOG(ERR, "RX coalescing is not supported");
+			continue;
+
+		default:
+			DRV_LOG(ERR, "Unknown RX CQE type %d",
+				oob->cqe_hdr.cqe_type);
+			continue;
+		}
+
+		DRV_LOG(DEBUG, "mana_rx_comp_oob CQE_RX_OKAY rxq %p", rxq);
+
+		mbuf->data_off = RTE_PKTMBUF_HEADROOM;
+		mbuf->nb_segs = 1;
+		mbuf->next = NULL;
+		mbuf->pkt_len = oob->packet_info[0].packet_length;
+		mbuf->data_len = oob->packet_info[0].packet_length;
+		mbuf->port = priv->port_id;
+
+		if (oob->rx_ip_header_checksum_succeeded)
+			mbuf->ol_flags |= RTE_MBUF_F_RX_IP_CKSUM_GOOD;
+
+		if (oob->rx_ip_header_checksum_failed)
+			mbuf->ol_flags |= RTE_MBUF_F_RX_IP_CKSUM_BAD;
+
+		if (oob->rx_outer_ip_header_checksum_failed)
+			mbuf->ol_flags |= RTE_MBUF_F_RX_OUTER_IP_CKSUM_BAD;
+
+		if (oob->rx_tcp_checksum_succeeded ||
+		    oob->rx_udp_checksum_succeeded)
+			mbuf->ol_flags |= RTE_MBUF_F_RX_L4_CKSUM_GOOD;
+
+		if (oob->rx_tcp_checksum_failed ||
+		    oob->rx_udp_checksum_failed)
+			mbuf->ol_flags |= RTE_MBUF_F_RX_L4_CKSUM_BAD;
+
+		if (oob->rx_hash_type == MANA_HASH_L3 ||
+		    oob->rx_hash_type == MANA_HASH_L4) {
+			mbuf->ol_flags |= RTE_MBUF_F_RX_RSS_HASH;
+			mbuf->hash.rss = oob->packet_info[0].packet_hash;
+		}
+
+		pkts[pkt_received++] = mbuf;
+		rxq->stats.packets++;
+		rxq->stats.bytes += mbuf->data_len;
+
+drop:
+		rxq->desc_ring_tail++;
+		if (rxq->desc_ring_tail >= rxq->num_desc)
+			rxq->desc_ring_tail = 0;
+
+		cqe_processed++;
+
+		/* Post another request */
+		ret = mana_alloc_and_post_rx_wqe(rxq);
+		if (ret) {
+			DRV_LOG(ERR, "failed to post rx wqe ret=%d", ret);
+			break;
+		}
+	}
+
+	if (cqe_processed)
+		mana_rq_ring_doorbell(rxq);
+
+	return pkt_received;
+}
-- 
2.17.1